Bang is a wise old man who helps people. He is a pro hero and martial artist. Hes Rank 3 of S class. He strives to help the people and protect earth. When time comes to it he shall destroy enemies of the people. He created the martial art Water Stream Rock Smashing Fist. And had perfected his martial art. His student garou betrayed him, beat his students up, and started to become a hero hunter. He strives to defeat his past student as he thinks its his mistake.